WordPress at a glance
function is not described

prep_atom_text_construct() WP 2.5.0

Determine the type of a string of data with the data formatted.

Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1.

In the case of WordPress, text is defined as containing no markup, xhtml is defined as "well formed", and html as tag soup (i.e., the rest).

Container div tags are added to xhtml values, per section 3.1.1.3.

No Hooks.

Return

Array. array(type, value)

Usage

prep_atom_text_construct( $data );
$data(string) (required)
Input string

Code of prep atom text construct: wp-includes/feed.php WP 5.2.2

<?php
function prep_atom_text_construct( $data ) {
	if ( strpos( $data, '<' ) === false && strpos( $data, '&' ) === false ) {
		return array( 'text', $data );
	}

	if ( ! function_exists( 'xml_parser_create' ) ) {
		trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );

		return array( 'html', "<![CDATA[$data]]>" );
	}

	$parser = xml_parser_create();
	xml_parse( $parser, '<div>' . $data . '</div>', true );
	$code = xml_get_error_code( $parser );
	xml_parser_free( $parser );

	if ( ! $code ) {
		if ( strpos( $data, '<' ) === false ) {
			return array( 'text', $data );
		} else {
			$data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";
			return array( 'xhtml', $data );
		}
	}

	if ( strpos( $data, ']]>' ) === false ) {
		return array( 'html', "<![CDATA[$data]]>" );
	} else {
		return array( 'html', htmlspecialchars( $data ) );
	}
}